Fred is put on trial after he is wrongfully accused of dressing up as a toxic waste mutant. The trial goes further awry after Fred is accused of inventing every mystery he has ever solved. Though Daphne agrees on being Fred's defense lawyer, her and the rest of the gang's antics serve no help to Fred, who risks being put away in prison if charged with the crime.

The gang visits a bayou in New Orleans, where a swamp monster is frightening away anyone who comes into his swamp. Meanwhile, Daphne pretends to be a vampire.

The gang is invited to a monster mystery party, where they try solve the mystery of a fake ghostly apparition. When a real monster shows up though, Daphne Blake and Fred Jones are left to solve the mystery on their own, because no one else will believe them.

Velma's got an interview at the prestigious Kingston University, the most selective school in the country. The only catch? The dean wants her and the rest of the Scooby gang to figure out why the ghost of Elias Kingston, the school's founder, is haunting Kingston's book-filled halls!

The gang goes to the Sorcerer Snacks factory, where a real sorcerer is scaring everyone away. Meanwhile, Fred finds he can get Shaggy and Scooby to do anything he wants with a box of Sorcerer Snacks (a precursor to Scooby Snacks).

The gang goes aboard the Air Gigantica and tries to stop a gremlin from sabotaging the flight. Meanwhile, after the pilot quits, Daphne has to try to land the plane safely before it crashes.

Fred takes the gang to Mexico so they can experience the local Day of the Dead festivities. A mystery quickly pops up involving a long-dead historical figure named El Bandito, causing Fred to want to make himself a legend just like El Bandito. During the mystery, Daphne believes her deceased Aunt Cookie is communicating with her somehow.

It's a classic haunted house caper when a rich man, whose life Scooby once saved, writes Scooby into his will! Now, to collect his share of the fortune the gang must spend a night in a creepy mansion along with the rich man's kooky relatives and a spooky phantom!

The gang visits the town of Rockwellville in search of a Christmas mystery, but all they find is a pterodactyl who seems to have nothing to do with Christmas. Meanwhile, Daphne, who is tired of having her December 25th birthday overshadowed year after year, tries to convince the gang to celebrate her birthday instead of Christmas.

Fred takes the gang to visit The Vault, an old prison that is haunted by the ghost of Stealin' Stan, who died trying to escape from the prison.

The gang goes to a farm, where Fred develops a crush on Beth, a farmer's daughter. When a living scarecrow appears, Fred tries to impress Beth with his mystery solving skills, while Velma gets severe hay allergies and Daphne begins hoarding animals as "pets" after becoming jealous of Shaggy and Scooby's relationship.

After Daphne agrees to babysit her friend's son, Wayne, the gang ends up going to an amusement park where an insane killer clown is lurking. Daphne attempts to focus on allowing Wayne to have a good time, but the rest of the gang investigates the park and tries to solve the mystery of Madcap, the killer clown.

Shaggy and Scooby's favorite chef is finally opening his own restaurant but a monstrous Yeti threatens the opening night. The gang has to solve the mystery before dessert is served, while Shaggy and Scooby have to resist eating all the food that's meant for the customers!

The gang visits a technology company to solve the mystery of an evil robot who has been wreaking havoc.

Daphne takes the gang to her family's ancient castle where a giant is protecting it from the visitors. As the gang tries to solve the mystery, Daphne starts speaking Irish and Fred wears knight armor.

After the ghost of the Cliff Bride begins haunting a wedding that the gang is attending, they must go to extreme lengths to try to keep the bride, who is very superstitious, from finding out. However, this proves very challenging when the ghost seems to appear everywhere that the bride is. Meanwhile, Daphne becomes very wrapped up in the ideology of wedding traditions and Shaggy worries obsessively about his best man speech.

The gang climbs aboard the cruise ship run by Fred's cousin despite Velma's strong dislike of water.

Shaggy takes the gang to the Minor League Baseball stadium of his youth only to learn it's about to be shut down because a ghostly baseball player is scaring away all the fans.

Fred and the Gang go to the history of mysteries museum. When the God Sobek trashes the Egypt Exhibit the tour guide offer challenges Fred's leadership and leads the Gang.

To solve the mystery of a ghostly performer haunting her former venue, the Gang has to pretend to be a rock band themselves! But can they solve the case before Velma has to actually get on stage and sing?

The gang's trip to a ski resort is interrupted by a snow monster terrorizing the tourists. Meanwhile, Daphne attempts to get revenge on Fred for hitting her with a snowball three years ago by planning a snowball attack.

Fred attempts to hone the gang's mystery solving skills by taking them out camping in the wilderness. A perfect mystery opportunity soon comes along when they discover that viking ghosts have scared away all the tourists from camping in the area. However, the gang has to avoid the park ranger in the process, or risk being sent to "Forest Jail" forever.

Fred gets a call for help from Chuck, his daredevil of a best friend, leading the gang on a rescue mission deep into caverns of an ancient civilization that worships chickens.

To solve the mystery of a creepy Crystal Crawler - a bat-like cave monster - the Gang must venture into the Crystal Canopy - a labyrinth of intricate crystal formations. To make things worse, they can't speak a word while in the Canopy, because even the slightest sound will bring the crystals crashing down around them!

Daphne had always dreamed of meeting extraterrestrial life, but that dream becomes a nightmare when the gang gets caught up in the mystery of a scary alien monster and brought to Area 53 - a government facility so secret, it's two numbers higher than Area 51!